🛠️ Add tailwindcss.

postcss.config.cjs

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+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

src/app.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@font-face {
+  font-family: 'General-Sans';
+  src: url('/fonts/GeneralSans-Variable.woff2') format('woff2');
+  font-weight: 200 700;
+  font-display: swap;
+  font-style: normal;
+}

tailwind.config.cjs

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+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  darkMode: 'class',
+  content: ['./src/**/*.{html,js,svelte,ts}'],
+  theme: {
+    extend: {
+      colors: {
+        dark: '#161616'
+      },
+      fontFamily: {
+        sans: ['General-Sans', 'sans-serif']
+      },
+      fontSize: {
+        mini: '14px'
+      }
+    }
+  },
+  plugins: []
+};